Invention Grant
US09461565B2 Systems, apparatus, and methods for soft starting large AC motors with a variable frequency drive
有权
用于软启动具有变频驱动器的大型交流电机的系统,设备和方法
- Patent Title: Systems, apparatus, and methods for soft starting large AC motors with a variable frequency drive
- Patent Title (中): 用于软启动具有变频驱动器的大型交流电机的系统,设备和方法
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Application No.: US13915815Application Date: 2013-06-12
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Publication No.: US09461565B2Publication Date: 2016-10-04
- Inventor: Richard H. Osman
- Applicant: Siemens Aktiengesellschaft
- Applicant Address: DE München
- Assignee: SIEMENS AKTIENGESELLSCHAFT
- Current Assignee: SIEMENS AKTIENGESELLSCHAFT
- Current Assignee Address: DE München
- Main IPC: H02P1/30
- IPC: H02P1/30 ; H02P1/52 ; H02P3/00 ; H02P7/06 ; H02P27/04 ; H02P1/02 ; H02P25/18 ; G01R19/00

Abstract:
A system for soft starting a large AC motor may include a variable frequency drive (VFD) having a much lower voltage rating than the rated voltage of the AC motor. The VFD's voltage rating may be in a range of about 33% to about 67% of the AC motor's rated voltage. The AC motor may be coupled to a utility power source via conventional connections to leads of the AC motor's windings. The VFD may be connected to the AC motor via tapped connections within the windings of the AC motor such that the tap voltages are much less than the AC motor's rated voltage. A less expensive VFD may therefore be used to soft start the AC motor instead of a VFD having the same rated voltage as the AC motor. Methods of starting large AC motors with a VFD are also provided, as are other aspects.
Public/Granted literature
- US20130334998A1 SYSTEMS, APPARATUS, AND METHODS FOR SOFT STARTING LARGE AC MOTORS WITH A VARIABLE FREQUENCY DRIVE Public/Granted day:2013-12-19
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